Protector mechanism for looms



Dec.` 6, 1938. v. H. .JENNINGS PROTECTOR MECHANISM FOR LOOMS Filed June 2, 1956 bs F1a4 Fuij nhl m Y mmmim Lne T J 0 t nH M lwww m VA/ Patented Dec. 6, 1938 UNITED STATES PATENT OFFICE PROTECTOR IMECHANISM FOR LOOMS Application June 2, 1936, Serial No. 83,088

2 Claims.

This invention relates to protector mechanism for looms and it is the general object of the invention to facilitate the renewal of the spring which holds the protector finger against the shuttle binder.

Protector mechanisms of looms ordinarily employ a rod extending along the under forward side of the lay and having welded thereto daggers adapted for cooperation with a stopping mechanism, Fingers'on`the rod engage shuttle binders and are moved forwardly when the shuttle is boxed, thereby rolling the rod to depress the daggers below the stopping mechanism. t has been common practice heretofore to surround a portion of the rod with a torsion spring one end of which is secured to a collar on the rod, and the other of which extends rearwardly under the lay. The force of the spring is in a direction to hold the daggers in stopping position and the fingers against the binders. These springs break in loom operation and because oi their construction it has been necessary heretofore to alter the rod in some way, such as cutting or removing a dagger to be rewelded later, to permit the application of a new spring.

It is an important object of my present invention to provide a torsion spring the coils of which are suiiiciently large in diameter, and the pitch of which is suliiciently great, to permit threading the spring along the rod with the dagger Vbetween the coils. The spring will have one end .to be received by the collar on the rod, and the other arranged for rearward extension under the lay. The distance between adjacent coils of the spring will vary with the width of the dagger used.

`With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

Fig. l is a front elevation of one end of a lay 45 with my invention applied thereto,

Fig. 2 is a vertical section on line 2--2 of Fig. 1

Fig. 3 is a diagrammatic View showing the protector rod and dagger in plan, together with 50 the coil spring, taken in the direction of arrow 3, Fig. l,

Fig. 4 is a fragmentary diagrammatic view indicating the relation and proportions of the spring and protector rod parts,

55 Fig. 5 indicates the initial step in threading the spring along the rod and over the nger hub, and

Fig. 6 is similar to Fig. 5 but showing the relation with respect to the protector nger.

Referring to the drawing, the loom frame I0 has a breast beam Il and a knock-off lever I2 thereon. The lay I3 is mounted on swords I4 and may if desired be provided with a gang of shuttle boxes l5 each having a binder I6.

A protector rod 2i! extends along the front lower edge of the lay and rocks in bearings 2l, one of which is shown in Fig. 1. This bearing has a foot 22 removable from the lay and is located between one end of the protector rod and an adjacent dagger 23 welded to the rod. A protector linger 2t has a hub 25 Secured to the end of the rod by a set screw 26 and extends upwardly to have engagement with the binder corresponding to the shuttle box in active position, as indicated in Fig. 1.

Under normal loom operation the lay approaches the breast beam and if the shuttle is properly boxed its corresponding binder will rock the finger to the left as viewed in Fig. 2 to oscillate the o protector rod and thereby depress the left or forward end of the protector nger 23 causing the latter to clear the knock-off lever l2. Should the shuttle fail to be boxed, however, the finger will not be rocked and the dagger engages lever I2 to stop the loom by moving the shipper handle 0 23 tothe right as viewed in Fig. 2. -It is to be understood that the motion oi the protector rod is against the action of a spring to be described hereinafter, but in all other respects the mechanism hereinbefore set forth may be of the usual construction and operate in the ordinary manner.

In carrying my present invention intov eiTect I provide a coil spring 35 having one .end extended as at 35 to project into a collar 3l ad- 40 justably secured in angular relation with respect to the protector rod by means of set screw 38 for the purpose of varying the pressure exerted by the spring. The other end of the spring is projected rearwardly as at 39 to lie under the 45 lay in the usual manner, The lay resists the spring through end 39, causing the spring to urge the finger 2li normally to the right, see Fig. 2.

The proportions of the spring coils with respect to the dagger and also preferably though not necessarily with respect to the linger 24 is an important part of my present invention. The dagger, as shown in Fig. 4, has a width a measured in the direction of the length of the protector rod, while the width of nger 24 is indi- 55 cated at b. The distance between adjacent coils of the spring will ordinarily be approximately a', the latter being not substantially less than a, or the width of the dagger 23 or protector linger 2d. It is to be understood, however, that the inherent resilience of the spring will permit it to be wound with a pitch somewhat less than the width of the dagger because of the fact that the coils can be spread to t over the dagger.

The diameter of the hub 25 indicated at c may have an important bearing on the internal diameter of the coils if the construction is such that the spring is to be applied to the rod without disturbing the iinger. This latter may be a desirable method of procedure but is not necessary. When it is used, however, the internal diameter of the spring c will be somewhat greater than the diameter of the hub 25 so that the spring can slip over said hub without undue resistance. In practice, when a spring is to be renewed the bearings 2| are loosened from the lay and the lingers removed from the ends of the rod, after which the bearings can be slipped off. Then the new spring will be applied as indicated in Fig. 6 with the dagger 23 rod can be removed from the bearings without removal of the protector nger, and it is desirable to preserve the angular relation between the ringer and the dagger, the method indicated in Fig. 5 may be used. As shown therein the coils I and II are disposed so that the nger 24 lies between them, after which a turning of the spring in the direction of arrow 1^ similar to that already described with respect to Fig. 6 will move the spring to the dagger adjacent the finger, after which threading of the dagger may be carried out as already described. Should the distance between the nger and the dagger be something other than an aliquot multiple of the pitch of the spring, the coils can be compressed lengthwise somewhat because of their inherent resilience to accommodate the difference.

As will be noted from the drawing, particularly Figs. 4, 5 and 6 the space a' between adjacent convolutions is greater than the diameter of the protector rod 20. As a result of this relation I may if I desire t the spring over the protector rod directly without threading it past the hub of the linger or the dagger. The method of applying a spring to the rod 20 employs a relationship similar to that shown for instance in Fig. 6 except that the convolutions will be turned one by one on to the protector rod instead of the protector ringer as shown in that gure.

From the foregoing it will be seen that I have provided a spring which can be threaded onto the protector rod without requiring removal of the dagger, the pitch of the spring bearing such a relation to the width of the dagger as to permit progressive feeding of the spring as the latter is turned around the rod.. It will also be seen that when desired the internal diameter of the spring can be such as to fit over the hub 25, and in the latter instance it will also be seen that the distance between adjacent coils of the spring will be not substantially less than the width of the finger 24 at the point where it joins the hub 25.

Having thus described my invention it will be seen that changes and modications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish tobe limited to the details hereindisclosed, but what I claim is:

l. In a loom having a lay, a one-piece protector rod having a diametral dimension, a dagger near each end of the rod integral therewith and having a lateral dimension measured in the direction of the length of the rod, and a coiled spring mounted on the rod between the daggers and having an internal diameter greater than said diametral dimension, the distance between adjacent coils of the spring being at least equal to the lesser of said dimensions.

2. In a loom having a lay, a one-piece protector rod having a diametral dimension, a dagger near each end of the rod integral therewith and having a lateral dimension measured along the length of the rod, aprotector rod iinger having a hub secured to the rod, and a coiled spring mounted on the rod between the daggers and having a pitch between adjacent coils equal at least to the lesser of said dimensions, said spring being capable of being threaded over said hub from the adjacent end of the rod to a position beyond the iinger.

VICTOR H. JENNINGS. 

